feat: add C implementation math/base/special/atan2f

[ShabiShett07]

Resolves #649.

Description

What is the purpose of this pull request?

This pull request:

• Solves the part of the issue [RFC]: Add C implementations to base special math functions (tracking issue) #649 by adding the package math/base/special/atan2f

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: Add C implementations to base special math functions (tracking issue) #649

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No.

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• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[Neerajpathak07]

duplicate of #3338

[ShabiShett07]

duplicate of #3338

I didn't see that in the issue #649

[ShabiShett07]

duplicate of #3338

But it has some errors right?

[Neerajpathak07]

@ShabiShett07
Was made quite a while ago so must have been pretty up in the history.
Yeah, there are a few issues but it's just related to changing the fixtures which I'll do by tomorrow on priority!!

[Neerajpathak07]

@ShabiShett07 also your runner.jl had atan whereas we needed fixtures for atan2f which has 2 arguments in it whereas atan has a single argument. So, if they have been generated from there they might be incorrect